Earthquakes and Structures

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Design of RC moment frame buildings consistent with earthquake resistant design philosophy

  • Palissery, Sunitha (Earthquake Engineering Research Centre, International Institute of Information Technology Hyderabad) ;
  • Goswami, Rupen (Department of Civil Engineering, Indian Institute of Technology Madras) ;
  • Murty, C.V.R. (Department of Civil Engineering, Indian Institute of Technology Madras)
  • Received : 2020.10.28
  • Accepted : 2021.05.21
  • Published : 2021.06.25
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Abstract

Earthquake Resistant Design Philosophy seeks (a) no damage, (b) no significant structural damage, and (c) significant structural damage but no collapse of normal buildings, under minor, moderate and severe levels of earthquake shaking, respectively. A procedure is proposed for seismic design of low-rise reinforced concrete special moment frame buildings, which is consistent with this philosophy; buildings are designed to be ductile through appropriate sizing and reinforcement detailing, such that they resist severe level of earthquake shaking without collapse. Nonlinear analyses of study buildings are used to determine quantitatively (a) ranges of design parameters required to assure the required deformability in normal buildings to resist the severe level of earthquake shaking, (b) four specific limit states that represent the start of different structural damage states, and (c) levels of minor and moderate earthquake shakings stated in the philosophy along with an extreme level of earthquake shaking associated with the structural damage state of no collapse. The four limits of structural damage states and the three levels of earthquake shaking identified are shown to be consistent with the performance-based design guidelines available in literature. Finally, nonlinear analyses results are used to confirm the efficacy of the proposed procedure.

Keywords

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